Meanwhile, midfielders David Dunn and Vince Grella have been ruled out of the start of the Premier League season on 15 August as niggling injuries have forced both players to miss the majority of the club's pre-season friendlies.
Allardyce said: "It's a growing concern by the fact they've started this pre-season where they left off last.
"We particularly wanted those two players to get through a full pre-season. One because Vince had his first year disrupted by niggles and pulls.
"Dunny ended up missing the back part of last season to get the operation to get fit. Thankfully it's nothing to do with the Achilles tendon, it's only a bit of a thigh but he's missing days where he should be out with the rest of the lads."
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